Improvement in steam-generator



liniird (gieten ROBERT A. CHESEBROUGH, OF YORK, N. Y.

Letters Patent' No. 93,176, dated August 3, 1869.

IMPROVEMENT IN STEAM-GENERATOR.

The Schedule referred to in these Lette-rs Patent and making pari: ofthe same.

To all whom it 'may concern:

Be it known that I, ROBERT A. OHEsEnnoUGH, of the city of New York,State of New York, have invented a new and useful Improvement inSteam-Boilers and Furnaces; and I hereby declare the following to be afull, clear, and exact description thereof, which will enable thoseskilled in the ait to make and use the same, reference being had to theaccompanying drawing, which .forms part of this specification.

rIhe object of this improvement is to produce a steam-boiler andfurnace, for motive-power and heating-purposes, which will generatesteam with rapidity, and consume less fuel than those now generally 1nuse.

My invention consists in constructing a brick lfurnace in severaldistinct compartments, in each of which the continuation of a singlelong worm is coiled, one end of which connects with the water-pumpoutside the furnace, and the other end with the steam-rccciver, whichreceiver' is laid horizontally on the top of and acts as a ceiling toeach of the several coinpartments.

The heat 'from the tire, which is placed in the first compartment, isobliged to successively enter and fill cach compartment, and so heat theentire room, as also the steam-receiver, before it can escape up thechimney.

The water, from which the steam is generated, isv contained in the wormsor pipe, and may also c'over the bottom of the steam-receiver, to afforda larger surface for evaporization.l

Steamrgenerators have before been constructed, in part, of pipe orworms; but, in all such, itwill be seen that they are made of a seriesof pipes, having several communications with eachother, and withthedrumhead or steam-receiver, while the distinctive feature in myboiler is, that the worm is made in one long, continupus piece, havingbut one connection, at its extreme end, with the steam-receiver, so thatevery gallon of water forced in at the beginning of the worm, must' passthrough its entire length before entering the receiver.

Furnaces have been before constructed so that the heat may be conductedalong the sides, or amongst the tubes of a boiler; but the distinctivefeature of my furnace is in the separate compartments, their confnections with each other, and the method of conducting the heat so thatit shall be obliged to fill each compartment successively, thus heatingthe worm therein, and the steam-receiver' 011 top.

Having thus explained the general character of my invention, thefollowing brief description, with reference to the accompanyingdrawings, will suffice td show' how the same is or may be carried intoeffect.

Figure I is an oblique View of the exterior of the boiler and furnace.

'Figure II is an oblique inside view of the heatingcompartments of thefurnace.

Figure III is au inside side view'of the water-worm, and 'its location.

Similar letters indicate corresponding parts.

Let C represent a furnace, which, for example, mayl be said to be abouttwelve feet long, six feet high, and four feet wide, the interior ofwhich is divided longitudinally into four compartments, a b c cl, eachof which will be (allowing for the thickness of the outside, anddividing brick wal1s,) about two feet square and five feet deep.

The re-grate and grate-bars are situated at D,in the first compartment,d.

- The steam-receiver E, which is of cylindrical form,

about one foot in diameter, and twelve feet long, and

having a steam-drum, F, thereon, lies horizontally on top ofthe furnace,beingsupported by the brick-work which separates the compartments, andforms the ends of the furnace, into which it is sunk, so that it forms acomplete ceiling or top for each compartment.

Y The heat, generated by the fire at D, rises and passes Y through theopenings c into the compartment c, which it fills, and, descending,passes, by the outlet j, into the compartment b, which it fills, and,rising, passes, through the openings g, into the compartment a, whichit'fllls, and, descending, passes into the chimney by the flue G.

rlhus, the heatvpasscs alternately into one compartment at the top, andinto the next at the bottom, and so fills, in succession, every part ofeach compartment, before being drawn by the draught into the chimney.

In the several compartments a b c d is coiled along, continuous worm, inone length, H, the outside end of which communicates with thewater-pump.

It enters the'compartment d at I, in which it is coiled, and then passesthrough the brick partition, by a tight joint, into the compartment c,where it formsA a second coil; thence into b, where it forms -a thirdcoil; and thence into a, where it forms a fourth' coil and thenceintothe steam-receiver' E,by a tight joint, at the point J.

Thus, the worm passes through all the heated chambers in' succession,and the water therein is subjected to great heat, and may be allconverted into steam before entering the receiver; but it is better thatthe engineer'will so regulate his water-pump and tire as to allow thebottom of his steam-receiver to be covered with water, the height ofwhich he can regulate by the cocks h It.

AThe heat7 which the receiver E is subjected to by being embedded iirthecompartments a b c d, will be sufficient to vaporize' the hot-watertherein contained, and keep up a head of steam for constant use, whichis taken by a pipe from the rsteam-drum F, in theusual way.

It is apparent that the 'fmnacesides and.v dividingpnmtitions can bemade of iron instead of brick, and the apparatus put on wheels, and thusmade portable.

Instead of being coiled, the worm may be'composed of short pieces ofstraight pipe, connected by elbows or return bends.

What I claim as my invention, and desire to secure by Letters Patent,is-

The coiled pipes or worm 1I H, steam-receiver E, and theheating-compartments a b c d, constructed :md arranged, relatively toeach other, substantially es described'.

ROBT. A. OHESEBROUGH'.

Witnesses:

CRAs. BRAKE, W. H. CHBSEBROUGH.

